The optical transmission has the advantages of light weight, small size, transmission distance, large capacity, small signal attenuation, anti-electromagnetic interference, has been widely used in a variety of network. With the twenty-first century will be the advent of fiber optic cable will certainly constitute the main body of China's network data transmission, telecommunications, cable television and other private network. In the choice of cable, twisted-pair cable and coaxial cable, can be roughly determined by visual inspection and simple test its performance advantages and disadvantages. Understand and select fiber is not so simple, compared with cable, twisted pair cable, coaxial cable, complex structure, a wide variety of materials, in addition to the existing technical parameters, there are many potential factors (materials, production processes, equipment, etc.) the slightest mistake, not to mention two or three decades is no guarantee that life is several years of technological parameters may not be standard. So we build a network, it is necessary cable structure for deep knowledge and understanding of materials, technology, etc., in order to choose a suitable model of high quality fiber optic cable.
Choose different types of fiber optic cable according to the number of cores
The center beam tube, Stranded, skeleton and ribbon cable structure can be divided into several different uses is not the same structure based on line conditions, the user can make any such request. Geenerally less than 12 cores using the center beam tube, central tube process is simple and costs low (about 15% cheaper than the price of Stranded cable), competitive aerial installation or have a good network of branch trunk pipeline protection; Stranded cable place the center of the strand or single wire to strengthen SZ continued synthetic cable, a cable fiber up to 144 core. Its biggest advantage is waterproof, anti-strong pull, a strong lateral pressure. Can be used for direct sale of land. And easy forked cable part of the fiber, respectively, do not have the entire fiber optic cable breaking, breaking can simply be bifurcated fiber for data communication networks. Cable television network along the additional optical node is favorable; thousands of core ribbon cable core number can be done, it is arranged in rows 4 to 12 core optical fiber to form a ribbon fiber unit, then a plurality of strip unit by a certainarranged in a cable network level fiber optic cable is generally used in the beam tube and two layer continued to.
Choose the appropriate fiber optic cable in accordance with the purposes
According to the use of different fiber optic cable can be divided into aerial optical fiber cable, buried cable, pipe and cable, submarine cable and metal cable. Aerial cables, high strength, temperature coefficient is small; direct buried fiber optic cable anti-buried, compression, moisture-proof, anti-humidity characteristics, resistance to chemical attack; duct and undersea fiber optic cable will have to water oressure resistance, tension-resistant, waterproof characteristics; metal fiber optic cable can be set up with high-voltage lines, insulation is better, although there is no iron body to strengthen the core but should have a certain tensile strength. Therefore, in the purchase of the cable, the user is selected based on the use of fiber optic cable, and manufacturers request, to ensure that the fiber optic cable using a steady, reliable.
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